REGICIDE. The killing of a king, aud, by extension, of a queen. Theorie des Lois Criminelles, vol. 1, p. 300. REGIDOR. Laws of the Spanish empire of the Indies. One of a body, never exceeding twelve, who formed a part of the ayuntamiento or municipal council in every capital of a jurisdiction. The office of regidor was held for life, that is to say, during the pleasure of the supreme authority. In most places the office was purchased; in some cities, however, they were elected by persons of the district, called capitulares. 12 Pet. R. 442, note.